
/*
 * Copyright (C) Igor Sysoev
 * Copyright (C) Nginx, Inc.
 */


#ifndef _NGX_HTTP_H_INCLUDED_
#define _NGX_HTTP_H_INCLUDED_


#include <ngx_config.h>
#include <ngx_core.h>


typedef struct ngx_http_request_s    ngx_http_request_t;
typedef struct ngx_http_upstream_s   ngx_http_upstream_t;
typedef struct ngx_http_cache_s      ngx_http_cache_t;
typedef struct ngx_http_file_cache_s ngx_http_file_cache_t;
typedef struct ngx_http_log_ctx_s    ngx_http_log_ctx_t;
typedef struct ngx_http_chunked_s    ngx_http_chunked_t;
typedef struct ngx_http_v2_stream_s  ngx_http_v2_stream_t;

typedef ngx_int_t (*ngx_http_header_handler_pt)(ngx_http_request_t *r,
                                                ngx_table_elt_t    *h,
                                                ngx_uint_t          offset);
typedef u_char *(*ngx_http_log_handler_pt)(ngx_http_request_t *r,
                                           ngx_http_request_t *sr, u_char *buf,
                                           size_t len);


#include <ngx_http_variables.h>
#include <ngx_http_config.h>
#include <ngx_http_request.h>
#include <ngx_http_script.h>
#include <ngx_http_upstream.h>
#include <ngx_http_upstream_round_robin.h>
#include <ngx_http_core_module.h>

#if (NGX_HTTP_V2)
#include <ngx_http_v2.h>
#endif
#if (NGX_HTTP_CACHE)
#include <ngx_http_cache.h>
#endif
#if (NGX_HTTP_SSI)
#include <ngx_http_ssi_filter_module.h>
#endif
#if (NGX_HTTP_SSL)
#include <ngx_http_ssl_module.h>
#endif


struct ngx_http_log_ctx_s
{
    ngx_connection_t   *connection;
    ngx_http_request_t *request;
    ngx_http_request_t *current_request;
};


struct ngx_http_chunked_s
{
    ngx_uint_t state;
    off_t      size;
    off_t      length;
};


typedef struct
{
    ngx_uint_t http_version;
    ngx_uint_t code;
    ngx_uint_t count;
    u_char    *start;
    u_char    *end;
} ngx_http_status_t;


#define ngx_http_get_module_ctx(r, module) (r)->ctx[module.ctx_index]
#define ngx_http_set_ctx(r, c, module)     r->ctx[module.ctx_index] = c;


ngx_int_t ngx_http_add_location(ngx_conf_t *cf, ngx_queue_t **locations,
                                ngx_http_core_loc_conf_t *clcf);
ngx_int_t ngx_http_add_listen(ngx_conf_t *cf, ngx_http_core_srv_conf_t *cscf,
                              ngx_http_listen_opt_t *lsopt);


void ngx_http_init_connection(ngx_connection_t *c);
void ngx_http_close_connection(ngx_connection_t *c);

#if (NGX_HTTP_SSL && defined SSL_CTRL_SET_TLSEXT_HOSTNAME)
int ngx_http_ssl_servername(ngx_ssl_conn_t *ssl_conn, int *ad, void *arg);
#endif
#if (NGX_HTTP_SSL && defined SSL_R_CERT_CB_ERROR)
int ngx_http_ssl_certificate(ngx_ssl_conn_t *ssl_conn, void *arg);
#endif


ngx_int_t ngx_http_parse_request_line(ngx_http_request_t *r, ngx_buf_t *b);
ngx_int_t ngx_http_parse_uri(ngx_http_request_t *r);
ngx_int_t ngx_http_parse_complex_uri(ngx_http_request_t *r,
                                     ngx_uint_t          merge_slashes);
ngx_int_t ngx_http_parse_status_line(ngx_http_request_t *r, ngx_buf_t *b,
                                     ngx_http_status_t *status);
ngx_int_t ngx_http_parse_unsafe_uri(ngx_http_request_t *r, ngx_str_t *uri,
                                    ngx_str_t *args, ngx_uint_t *flags);
ngx_int_t ngx_http_parse_header_line(ngx_http_request_t *r, ngx_buf_t *b,
                                     ngx_uint_t allow_underscores);
ngx_int_t ngx_http_parse_multi_header_lines(ngx_array_t *headers,
                                            ngx_str_t *name, ngx_str_t *value);
ngx_int_t ngx_http_parse_set_cookie_lines(ngx_array_t *headers, ngx_str_t *name,
                                          ngx_str_t *value);
ngx_int_t ngx_http_arg(ngx_http_request_t *r, u_char *name, size_t len,
                       ngx_str_t *value);
void      ngx_http_split_args(ngx_http_request_t *r, ngx_str_t *uri,
                              ngx_str_t *args);
ngx_int_t ngx_http_parse_chunked(ngx_http_request_t *r, ngx_buf_t *b,
                                 ngx_http_chunked_t *ctx);


ngx_http_request_t *ngx_http_create_request(ngx_connection_t *c);
ngx_int_t           ngx_http_process_request_uri(ngx_http_request_t *r);
ngx_int_t           ngx_http_process_request_header(ngx_http_request_t *r);
void                ngx_http_process_request(ngx_http_request_t *r);
void                ngx_http_update_location_config(ngx_http_request_t *r);
void                ngx_http_handler(ngx_http_request_t *r);
void                ngx_http_run_posted_requests(ngx_connection_t *c);
ngx_int_t           ngx_http_post_request(ngx_http_request_t        *r,
                                          ngx_http_posted_request_t *pr);
void ngx_http_finalize_request(ngx_http_request_t *r, ngx_int_t rc);
void ngx_http_free_request(ngx_http_request_t *r, ngx_int_t rc);

void ngx_http_empty_handler(ngx_event_t *wev);
void ngx_http_request_empty_handler(ngx_http_request_t *r);


#define NGX_HTTP_LAST  1
#define NGX_HTTP_FLUSH 2

ngx_int_t ngx_http_send_special(ngx_http_request_t *r, ngx_uint_t flags);


ngx_int_t
          ngx_http_read_client_request_body(ngx_http_request_t             *r,
                                            ngx_http_client_body_handler_pt post_handler);
ngx_int_t ngx_http_read_unbuffered_request_body(ngx_http_request_t *r);

ngx_int_t ngx_http_send_header(ngx_http_request_t *r);
ngx_int_t ngx_http_special_response_handler(ngx_http_request_t *r,
                                            ngx_int_t           error);
ngx_int_t ngx_http_filter_finalize_request(ngx_http_request_t *r,
                                           ngx_module_t *m, ngx_int_t error);
void      ngx_http_clean_header(ngx_http_request_t *r);


ngx_int_t ngx_http_discard_request_body(ngx_http_request_t *r);
void      ngx_http_discarded_request_body_handler(ngx_http_request_t *r);
void      ngx_http_block_reading(ngx_http_request_t *r);
void      ngx_http_test_reading(ngx_http_request_t *r);


char     *ngx_http_types_slot(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
char     *ngx_http_merge_types(ngx_conf_t *cf, ngx_array_t **keys,
                               ngx_hash_t *types_hash, ngx_array_t **prev_keys,
                               ngx_hash_t *prev_types_hash,
                               ngx_str_t  *default_types);
ngx_int_t ngx_http_set_default_types(ngx_conf_t *cf, ngx_array_t **types,
                                     ngx_str_t *default_type);

#if (NGX_HTTP_DEGRADATION)
ngx_uint_t ngx_http_degraded(ngx_http_request_t *);
#endif


extern ngx_module_t ngx_http_module;

extern ngx_str_t ngx_http_html_default_types[];


extern ngx_http_output_header_filter_pt ngx_http_top_header_filter;
extern ngx_http_output_body_filter_pt   ngx_http_top_body_filter;
extern ngx_http_request_body_filter_pt  ngx_http_top_request_body_filter;

#if (T_NGX_INPUT_BODY_FILTER)
extern ngx_http_input_body_filter_pt ngx_http_top_input_body_filter;
#endif


#endif /* _NGX_HTTP_H_INCLUDED_ */
